Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-20-000211-index-headers.html | 2020-08-24 06:07:34 | |
| 0000860413-20-000211-index.html | 2020-08-24 06:07:34 | |
| 0000860413-20-000211.txt | 2020-08-24 06:07:34 | |
 0000860413-20-000211-xbrl.zip | 13448 | 2020-08-24 06:07:34 |
| fibk-20200821.htm | 53422 | 2020-08-24 06:07:34 |
| fibk-20200821.xsd | 2411 | 2020-08-24 06:07:34 |
| fibk-20200821_cal.xml | 702 | 2020-08-24 06:07:34 |
| fibk-20200821_def.xml | 1635 | 2020-08-24 06:07:34 |
| fibk-20200821_htm.xml | 10882 | 2020-08-24 06:07:34 |
| fibk-20200821_lab.xml | 24275 | 2020-08-24 06:07:34 |
| fibk-20200821_pre.xml | 12638 | 2020-08-24 06:07:34 |
| FilingSummary.xml | 1673 | 2020-08-24 06:07:34 |
| Financial_Report.xlsx | 5458 | 2020-08-24 06:07:34 |
| MetaLinks.json | 17159 | 2020-08-24 06:07:34 |
| R1.htm | 38621 | 2020-08-24 06:07:34 |
| report.css | 2767 | 2020-08-24 06:07:34 |
| Show.js | 1085 | 2020-08-24 06:07:34 |